The SPVM has tweeted out repeated warnings to Montreal residents as May Day anti-capitalist protests sweep the city.\nWhile the police had alerted residents to possible traffic disruptions earlier in the afternoon, reports of illegal activity prompted authorities to order protestors to disperse.\nThere are currently ongoing police interventions in the neighbourhood of St-Henri. An eye-witness also tells MTLBlog that a police intervention has occurred downtown on rue Ste-Catherine, though the SPVM has not confirmed any activity there on its Twitter account.\nALSO READ: The STM Is Raising The Price Of Metro And Bus Tickets\nCe soir, dans le cadre du 1er mai, des marches sont prévues à Montréal. Cela pourrait causer certaines entraves à la circulation.#manifencours— Police Montréal (@SPVM) May 1, 2019\nThe police gave several warnings on social media before dispatching officers in riot gear.\nWarning given to the #manifencours : We are currently observing illegal behaviors. To ensure the event runs smoothly, we order the participants to follow all laws and regulations.— Police Montréal (@SPVM) May 1, 2019\n#ManifencoursOngoing police intervention. Avoid the Saint-Antoine/Atwater area.— Police Montréal (@SPVM) May 1, 2019\nRues St-Antoine and Atwater converge just south of the route 720 overpass between St-Henri and Westmount.\nWarning to the #manifencours : The #SPVM is conducting a dispersion and targeted interventions. Everyone must leave the premises and not interfere with the ongoing police intervention.— Police Montréal (@SPVM) May 1, 2019\nPhotos shared with MTLBlog by Instagram user caprikaren capture at least one fire downtown.\ncaprikaren\nA video posted to Twitter shows massive police activity near Lionel-Groulx STM metro station.\nBREAKING: Two minutes ago at Lionel-Groulx. #manifencours #polmtl pic.twitter.com/9kwUTnahLF— Ethan Cox (@EthanCoxMtl) May 1, 2019\nMay Day, or International Workers' Day, has long been an occasion for people to stage anti-capitalist demonstrations around the world.\nRaucous protests and the subsequent intervetion of police forces are not unheard of on May Day in Montreal.\nStay tuned for updates on this developing story.